Bellari HA540 MK2 Manual

Bellari Modtager HA540 MK2

Læs gratis den danske manual til Bellari HA540 MK2 (4 sider) i kategorien Modtager. Denne vejledning er vurderet som hjælpsom af 32 personer og har en gennemsnitlig bedømmelse på 4.5 stjerner ud af 16.5 anmeldelser. Har du et spørgsmål om Bellari HA540 MK2, eller vil du spørge andre brugere om produktet?

Download PDF

Side 1/4

HA540 MK2 Headphone Amp

WARNING: THE MINIMUM HEADPHONE IMPEDANCE FOR THE

HA540 IS 8 OHMS. THE MAXIMUM HEADPHONE IMPEDANCE IS 2000

OHMS.

DO NOT OPEN THE HA540. REMOVING THE UNITS COVER COULD

POTENTIALLY DAMAGE THE UNIT OR CAUSE HARM TO UNQUALI-

FIED PERSONS. THE UNIT OPERATES AT +150 VOLTS INSIDE.

HIGH VOLTAGES EXIST INSIDE THE UNIT EVEN WHEN THE UNIT

IS NOT POWERED ON. ALL WARRANTIES ARE VOID IF ANY INTER-

NAL COMPONENTS ARE DAMAGED DUE TO USER ERROR.

SPECIFICATIONS

Input Impedance: 47K ohms

Max Output Gain: 19.6 dB

THD: 0.04%, 20Hz-20KHz, at 1V RMS

S/N Ratio: 85 db, unweighted

Indicator: 1 Power LED

Max Output Power: 332 mW/side, 664 mW/Channel (30 Ohms)

Frequency Response: 6 Hz - 51 KHz +/- 3 db

Phase Shift (In to Out): 0 Deg.

Crosstalk: -75 dB

Headphone impedance: 8 Ohms to 2000 Ohms

Input Connectors: CH 1: RCA, 1/8" (3.5mm)Stereo; CH 2: RCA

Outputs: 1: 1/4" TRS Stereo jack

1: 1/8" (3.5 mm) TRS Stereo jack

PWR: 15 VDC 500mA

Size: 6"w x 2.5"h x 5.4"d

Weight: 2 lb.

headphone amplifier

HA540 MK2

MADE IN USA

Volume

input 1

input 2

Power

Input select

power

HA540 MK2

Headphone

MADE IN USA

Connection guide

Salt Lake City, UT

12/18

WARNING

USING THIS PRODUCT AT EXCESSIVE VOLUMES CAN CAUSE

PERMANENT HEARING DAMAGE.

USE AS LOW A VOLUME AS POSSIBLE

In order to use this system safely, avoid prolonged listening at excessive sound pressure

levels. Please use the following guidelines established by the Occupational Safety Health

Administration (OSHA) on maximum time exposure to sound pressure levels before hearing

damage occurs. 90 dB SPL at 8 hours

95 dB SPL at 4 hours

100 dB SPL at 2 hours

105 dB SPL at 1 hour

110 dB SPL at 1/2 hour

115 dB SPL at 15 minutes

120 dB SPL - avoid or damage may occur

CAUTION: Plugging a mono 1/4” or 1/8” TS plug into the Headphone Out-

puts on the HA540 will cause permanent damage to the unit because one side

would be shorted to ground. Never plug a mono plug into any of the Head-

phone Outputs THE HA540 WILL BE PERMANENTLY DAMAGED

Tip

Sleeve

(ground)

Tip

Ring

Sleeve

(ground)

This is a MONO

jack and should

never be plugged

into the Head-

phone Output of

a HA540.

This is a TRS or

stereo jack that

is compatible

with the HA540

Headphone

Outputs.

The warning section of the manual. Boring, but

hey we care about your hearing and health.

Thank you for purchasing the HA540. We spent a consider-

able amount of time designing and developing the HA540.

Hundreds of hours listening and improving the design. We

hope you enjoy using the HA540, and that it makes listening

to your music collection rewarding. We sincerely appreciate

the opportunity to build a product for you and participate in

your love of quality music and sound. We love what we do

and we’re happy to help. All Bellari products are hand built in

Salt Lake City, Utah by people who care about high quality

music.

What's in the box?

1 - Made in USA HA540

1 - 15V power supply PN PS27s

1 - This owners manual

1 - Love for great audio

CONNECTION:

1 - Connect your source to the HA540’s “in” RCA

jack or 1/8" stereo jack.

2 - Connect the supplied PS27s adapter to the

jack labeled “POWER.” Do not use any other

adapter, or the unit might not be happy and you would need

some repair work done. Reversed polarity adapters will

cause damage.

3 - Connect your headphones to the jack, marked “head-

phone”. You can use either the 1/8” or 1/4” jack or both at the

same time.

4 - Enjoy your music.

The HA540 uses one 12AX7 tube running at 150 volts. The

input signal is connected directly to the grid of the tube and

almost all of the gain of the HA540 is from the tube. The

output section is a pair of MOSFET's to drive headphones.

This is called a "hybrid circuit". The HA540 has no feedback

circuit or Integrated Circuits in the audio path, it is all analog.

FAQ:

Q:What is a N.O.S. tube?

A: N.O.S. refers to (new old stock) it is a tube that was man-

ufactured long ago and never used. These tubes are very

sought after. They may or may not sound any better, but it is

generally thought that most N.O.S. tubes are better in many

ways over new foreign manufactured tubes.

Q: What kind of tubes can I use in the HA540?

A: Tubes that can be used in the HA540 are:

12AX7 - The industry standard for preamp tubes.

12AX7A - Same as a 12AX7 but generally has a slightly

higher output.

7025 - This is the Military part number for a 12AX7.

ECC83 - This is the same as a 12AX7 it is the European part

number.

12AX7WA - This is a 12AX7 with slightly lower output.

5751 - This is a Military part number for a 12AX7WA.

There are many other tubes that can be used, but you get

where this is going they are essentially the same tube with

di󰀨erent part numbers doing almost exactly the same thing.

Q: What is the best sounding tube I can get for the HA540?

A: This is an unanswerable question. Everyone has di󰀨erent

tastes. It is up to the individual to decide as all tubes sound

slightly di󰀨erent. For me the best tube I have ever heard in a

HA540 was a N.O.S. 5751 Telefunken tube.

Q: Does the tube need time to warm up before use?

A: Yes, it will be usable in about 30 seconds. Longer warm

up times are not needed, there is no benet to warming the

tube up longer than 30 seconds. Warm up simply means

powering the unit on.

Produkt Specifikationer

Mærke:	Bellari
Kategori:	Modtager
Model:	HA540 MK2

Har du brug for hjælp?

Hvis du har brug for hjælp til Bellari HA540 MK2 stil et spørgsmål nedenfor, og andre brugere vil svare dig

Dit navn*

Din email*

Skriv dit spørgsmål her

Modtager Bellari Manualer

Bellari PP532 Manual

24 August 2025

Bellari HA540 MK2 Manual

3 September 2024

Bellari PA555 Manual

3 September 2024

Bellari PA253 Manual

3 September 2024

Bellari PA550 Manual

3 September 2024

Modtager Manualer

Nyeste Modtager Manualer

3 Oktober 2025

3 Oktober 2025

2 Oktober 2025

2 Oktober 2025

Shinybow SB-3706SV Manual

1 Oktober 2025

August MR260 Manual

1 Oktober 2025

Inday HDDA-1 Manual

1 Oktober 2025

Inday HDDA-2 Manual

1 Oktober 2025

Shinybow SB-3702 Manual

1 Oktober 2025

Ground Zero GZCA 3000X.M1 Manual

1 Oktober 2025